Fountain pen



FIG. 1 is a top plan view of a fountain pen showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right end elevational view; and

FIG. 5 is a left end elevational view.

The characteristic feature of our design resides in the combination of the chamfered ring adjacent the nib and the ring adjacent the barrel. 

The ornamental design for a fountain pen, substantially as shown and described. 